Slate-picker.



V w. J. Dvms.

l sum: Holm, APPLIOATION FILED DEO. 11,1907.

Patented Oct. 6,1908.

s emma-enum a.

Y y men/m5:

' W. fr. IEVM j SLATB PICKER. Ammomoxs nu 1120.11.1907.

murs@ uma. 6,1908. l 8 lBH'EH'IS--SHEBT 3.

WILLIAM J. navires, or scn'ANfroN, PENNSYLVANIA.

sLaTiri-:eierenn.

Specification of Lettera Patent.

Batented Qct. 6, 1908.

Application lcd Iccembcr 11, 1907. Serial No. Ismall?.

To all whom it may concern: I

*Be it known that I, WILLIAM J. Dnvans, a citizen. of the' United States, residing at Scranton, in the county of Lackawanna and l 'State of Pennsylvaniafh'ave invented a new and useful Slate-Picker,y of which the following is a'speciiication. g

.This invention relates tofmachines offthat class employed for separating-slate from coal. l The principal object of the invention'isfto provide a 'mechanism of improved construction in which the Icoal as it coinesfrom' the breaker is allowed'to travel over an-inclined chute having at its lower end an openin or passage for the slate, advantagebeingtaxen of A'the difference in specific gravities of 'the coal yand slate in order to insure the falling of the slate at the proper pointfwhileA the' lighter coal will travel acrossthe opening and'be delivered into a suitable receptacle.

A further object of the inventionl is to pro- Wide,1 means lfor controllingv4 the :feed of 1the "coat onv to the chute, the feed being-.intermittent, so thatftherewill be cnl a small quam tity of materialibeing treatedyat one time.

A still further object of the invention is to provide means for sub-dividing the quantity ed' intorows, that is to say, a single row extending the full width oi lthe chute `will'fbe allowed lto travel down the lchute at each operation, softhatthe lumps of coal 'and slate Wlll be free'to ilow iii-separate courses without crowding vor interference by a' ilowing Inassyof material, and in this way the individual members of the row will be'allowed to 'travel at independent s eeds, the lighter cal travelin faster than t e slate,- so that the coal wi acquire sufficient momentum. to jump .across the slate passage.

A still further object of-the invention is` to.`

lprovide anim roved means'foradjusting the angle ofthe ischarge end of the ichute for -the purpose of retarding the How of material to a greateror less extent, and further, to provi e means lfor adjusting the width ofthe slate passage in accordance with the condition of the coal.

`VViththese andother objects' in view, as will more fully hereinafter a pear, the invention consists in certain novel features of constructionand arranveinent of parts, herein` after fully describe illustrated in the accompanying drawings, and particularly pointed out inthe appendedclaims, it being understood that various changes in the form, "iroportiersgasize rind 'minor details 'of the the coal in position thereon.

p i4 and at suitable interva screens in order to structure inay be made'without departing from the spirit or sacrificing any of the'advanta es of the invention.

is a sectional elevation ofv a slate picker conr-structed .in accordance with the invention, a

portion of' the structure -bei shown in side elevation. Fig. 2 is a to p an View of the device. Fig. 3 is'adetal perspective view of one of the stop plates and adjacent parts;

Fig.- 4 is aside elevation ofthe same showing kFig. 5 is a detail perspective view trai hopper or chute 10 that leads directly frorn the breaker or other source of supply.

The pickers are shown as located Aon opposite sides of this central hopper, one being illustion.` f

The eneral framework comprises'sills 1.1 and a p urality of standards 12 andl3, which lare connected at the top b r inclined side bars is by obliquely disposed braces15. The bottom of the hopper 19 is provided with inclined bottom boards 16 which incline downward toward the sides of the hopper in both. directions from a cen "trated in side elevation and the other 1n sectral point, 1n order to direct the coal on to inclined chutes 17, and each of these chutes is provided with perforations which act as permit the passage of the ich passes down an inany convenient point of culm and slack, w clined chute 18 to discharge.

At each side of the hopper is pivoted a dis'- charge gate 19 that is forced to open position by the Weight of the coal in the ho per and is moved to closed position by a rociier arm 20 carried by a shaft 21 that is j ournaled in the upper portion of the frame. At one end of this shaft is an arm 22, the lower end of which is engaged by a 'cam 23 on a transversely disposed shaft 24, the cam serving at each. ro tation to positively lnove thf` gate to closed position. Movement of the arrn in the op posite direction is eiiected by a spring 25 which turns the rock shai't and moves the 'arm 2.0.fro1n engagement with the gate, so that the latter is free to swing to open posi- In tl e accompanying drawings:-Figure 1 j ofone ofthe curved plates used for separating the coal and the slate.

and'in'orderto save-t to separate the material into rows, the lifting" the plate;

ment with the stop plate 29. 'lhelumpsof across the lchutea'nd-aiggainst which the mfassmi coal and slate Which immediately'engage'thc of `n'ixedcoal andj slate rests, "a Va'e'rtically e 5 plate129andjres't on thebar-341-are'raised as. 'swingin ba'r-'arra'm 'ed immediately-to the.. the bar34 and platel' tilt upward," and this' rearofie plate anilserving to'su'pportltliat v5 rowzwill the`n travel down the'plateliand row' of `lumps nearest the plate,jand meansi passv on to thel chute 1.7; the initial imgetus for'elevatin'gfsaidbar to discharge the row of lmylrted by theangle'of the plateB-l.' eing lumps over the top o f -theplates ontofthefm' suc vas to carry the load ofcoal 'over the chute. l

chute. As the coal islighter than the slate, 3.V In a slate -pickingjmachine, aninclinedj 10 it will tend to travel ahead, the-heavier slatechute, -a stop; plate extending-transversely lagging behind Whilethe coal acquiressul-v` acrossthe chute, a narroW'b'a-rarrangedf'iinf J cient momentum to carry it across the slate` mediately to the rear ofthe plate, and means. 75" passage. The slate flowing more slowly and for elevatingsaid 'bar to carry u'p beyond' the;

eing further retarded by the plate/i0 LWill to of the plate the lumps oiV coal andslatejj l5 drop down through the passage in advance Wlllch are in engagement with the plate. of the platelfwhile the coal'continuesonto In a slate picking machine, an' inclined the receiving hopper 63.5 i .1 v

Inactual practice, a quantity of thecoal across' thechutefa pivotally mounted niemwill fall through the. assage With theslate, ber having a'slct for the passage of the plate,

is coal, the material is'A thatportion of the member beyondthe late .led over a second, andthen a thirdseparati'ng forming a narrow -bar forj'the supporto theV chute, 'a stop platevextending:transversely8o mechanism, each of. these being of precisely row of lumps restingA against-theplateyand ssii;

the same construction' as that above de means for swinging said plate' -u p'vvard, to scribed, each of them including a stop, plate calrythe lumps above the eveloi f jthe top o mechanism forfcarrying the row` over the -5111; a slate picking machine,an inclined` f plate, the chute,'and theo'ther devices, the chute, a stop plate extending=transversely 90 coal that is separatedfrorn the slateat' Vthe j across the "chute, 'a pivotally. mounted,meme4 second operatian -passingto-a bin" 63,and ber -farr'anged at the 'upper portion of the 30 the coal separated atV-'thethird operatio'n'bef chute, and' slotted for thepassageV of the ing dischargedat G Sfintc any 'suitablev replate, and arevoluble eccentric connected to cegtacle'.` Vsald memberyand arranged to swing the same 95' he coallwhichf passage between the lates flandjljstrikes againsty p ate. y y

35 a plateQ'ZO, t e rear'endoffwhich; has a ve'rf ,y'ln a slate' picking machine, an inclined tically"eXten :lec l' il1-arigeforming aguaidf4 Tc` ehirtc a`pivotally mountedv member at the i theloWerreaI" l ,'rti'cn 'o i'thisplateijs secured upper portion ofthe chute-and comprising a- 4100 'a' block 72,-andllilii's'hlock carrlesanumber'of pair of 'sectionsspaced from cachot er, bars forwardly projectingbars 73 each having va connecting saidsections', n-stop plate extend- 40 longitudinal-ll", arranged slott74 near itsfo'rving P'through'the'space between vthe sections f Ward-'endl' "'l'onted -on the bars 7 3, is' a' and recessed for the'passageof the bals, and

block 75,1carrying 'aplate'761that is:in1rne -'v 'means for moving lsaidmemberupward to a ,i405

A G0 nearest the stop. plate and. delivering the .31.

toured in' place by ollas-77 passing" -through V 7,*111 aslate'pickmgmachine, an'incline'd the s1ots'74, so-Tthat thefplatewrnaybeadchu-te, a retardin plate disposed at Vtheend. justed from and 'toward the'liting-bar'34of -o'fthe chute and aving a' doWnturnedf-lip, a the second separatingmeans;and'thnscom= *curved -plateloosely secured tac-said lip, "a v11( pensateforanyjexpansion oifjcontracti-on,-or support for the lower @edge .o'said cur-ved warging of the'part s. i. plate, means foradjusting-the-angularposi e several shafts "Z4-{gewaar} 24.*?3vhich '*tion` `of the retardin plate, an inclined 1re-' operate` the lifting platesare provided=witlg eei'vin'g platespaced roni the rotar-'ding plate,-

sprocket wheels- Which-'are connected byai 1maansj for 'adJusting tliereceiving plateto# 1r.'

link belt`81.,an'd one o f' 's`aid"slfi aijtsfisfhhnf Ward laridffrem theA retarding lplatefiaiid s nected to any'suitabledrivingme'chanis:rn.--lr "'ieans for adjusting the "angular-position of y 4. "1 said receivi'nglplatef, "j

v1:.In aslate'piclfzingmachina-aninclinedlf- In-testimonythat I Jclaiin the-fore 'ingas chute', astop plate', againstiwhichthe r'nixefd;` myown, I have heretoaixedmyf tu slate and coa ,Tenga e s 'andmeansyfor ele; inthe prsence oif'tvvo witnesses vatingthat row'cf u mps of coal andfs'la'te ,v

4 -chute, -a .stop plate extending transversely. -Man'rlnCLAnig 

